It happens. For example, I have it. Raw onions make me sneeze terribly. For other types: boiled, green, etc. no allergies.
Of course it happens. Allergy happens even to antiallergic drugs. In general, molecules of substances larger than a certain size can cause an allergic reaction. They definitely are in the bow.
Girls who have children with allergic reactions to household chemicals, advise a good mouthwash that does not cause skin problems.